Rotary pump



Dec. 22. 1953 E. MAYUS ETAL ROTARY PUMP 5 Sheets-Sheet l Filed Aug. 19,1949 IIIIIH'" jive/27h 6 622 az Q man@ IIIIIIII Dec. 22, 1953 E. MAYussul.

ROTARY PUMP 3 Sheets-Sheet 2 Filed Aug. 19, 1949 Dec. 22, 1953 E. MAYUs:1' A1.

ROTARY PUMP Filed Aug. 19, 1949` 3 Sheots-Sheet 3 fm U5 M, 54145411Patented Dec. 22, `1953- l 2,663,263 v A --oPF-ICE v ROTARY PUMP EugeneMayus, Chicago, Ill., andWalter George y See, Crown Point, Ind.; saidMayus assignor to submergedA Combustion Company of Am'er ica, Inc.,Hammond, Ind., a corporation of Indiana Application August 19, 1949,SerialrNU. 111,252

' 8 Claims. (Cl. 103-117) This invention relates to a rotary pump andmore particularly to a self-priming rotary pump having a plurality ofpumping units Within one housing.

An object of the present invention is to provide a rotary pump capableof handling large quantities of fluids in an exceptionally efficientmanner.

Another object is to provide a rotary pump which will be self-primingand positive acting.

A further object is to provide a rotary pump which will be substantiallyresistant to the corrosive action of fluids and slurries.

Still another object is to provide a rotary pump employing a novelflexible impeller vane construction and a curved cam for flexing thevanes within the pump casing.

rA still further object is to provide a novel rotary pump constructionin which a pumping action is effected in a plurality of placesrwithin asingle pump housing. f

According to the invention a rotary pump having a novel impeller vactionand a plurality of pumping actions Within one housing is providedwhereby an exceptionally efficient conveyance of `afluid is effected.Flexible corrosive resistant impeller blades are flexed by passing themover arcuate cam surfaces within thepump casing. Each cam surface isreversely curved inwardly intermediate of and spaced from an outlet andits succeeding inlet so as to squeeze the flexible varies successivelytoward the central axis of the pump. A resultant suction is produced atthe inlet openings and a pressure is produced at the discharge or outletopenings thereby setting up a pumping action.

The objects, advantages and features of the invention will be moreclearly understood by referring to the accompanying detailed descriptionand drawings in which: l

Y Figure 1 is an axial cross sectional view of the assembled pump;

Figure 2 is a top view'of the complete pump assembly showing the drivepulley and support bearing in plan and the pumpin section along thelines 22 of Figure'l;

Figure 3 is an enlarged partial section of the impeller and cam ofFigure 1;

Figure 4 is an enlarged sectional view of the pump housing illustratingthe grid construction at the inlets and outlets;

Figure 5 is a side planview of the pump showing thev manifold flanges;

Figure 6 is a top plan view of the pump housing and the manifoldassembly:A

Figure 7 is an end view of the pump housing of Figure 6;

`Figure 8 is aside view of the pump assembly represented in Figures 6and 7;

Figure 9 is a perspective of the upper portion of the manifold assemblyof Figures 6, 7 and 8; and

Figure 1.0is a perspective of the lower portion of the manifoldassembly.

Referring` to the drawings in greater detail, the pump housing I inFigures 1 and 2 consists of an outer casing 2 and a flange 3 to which anend plate I9 isattached. Integrally cast into the outer'casing 2 are twoinlet or suction openings 4 and 5, and two outlet lor discharge openings6 and 1.

manifolds 8 and 9 andthe discharge manifold I0 and I I. The manifoldsare connected to supply and discharge lines (not shown) leading to andfrom the pump. 4'Ihe pump housing is supported on the base I2 by meansofthesupport members I3, i4 and I5. l f

Fitted concentrically within the pump casing 2 is the impeller I6,whichisimounted upon the shaft I'I and fastened-thereto by means ofprojections I8 on the shaft interlocking with complemental wedge shapedrecesses on the impeller. The shaft Il entersthe-pump casingthrough asuitable opening-in the end vplate I9 and is enclosed by a packingglandA 20 held in place by the retainer ring. 2|. The shaft I'I issupported by the bearing `assembly 22 and is suitably driven through thepulley 23'to which it is secured. It4

will be recognized, of course, that any other means of driving the shaftI'I may be employed, such as byv direct connection with a motor. The.pump casing is closed at one end by the end. wearplate I9 and at theother end by the removable eoverplate 24.

The impeller le, which wmbe describesm` greater detail hereinafter, ismade of a molded nexible material such Vas rubber orV plastic, andpreferably of a corrosion resistant resilient material, for example,neoprene rubber. A plurale ity of flexible vanes- 25 are integrallyattached to the body portion of the impeller, extending radially fromthe shaft Il. As the impeller ro tates concentricallyvr within thepump'casing each of the exible vanesfisv-caused to flex as it passesoverthe raised reversely curved surfaces 26 and 21 within the casing.The volume. of space betweena flexed vane 'and thel preceding vane becomes largerv ythereby reducing the pressure within the space or,creating av suction.l .Con.

These ropenings connect'the interior of. the pump with the correspondingcast suction y 3 versely the volume of space between a ilexed vane andthe succeeding vane becomes smaller thereby increasing the pressureWithin the space. The cams 26 and 21 are so arranged within the casingthat the lreduced pressantek area is created immediatelyibeforeV one of:inlet openings 4 or 5` While the' increased pressure area occurs beforeone of the outlets 6 or 1. HenceL during operation of the pump theflexing of the vanes sucks uid into the pump in the A:one

instance and discharges uid from thepump in the other.

Figure 3 is a sectional View` of;a:,portionjoftne pump casing 2, aportion el thejimpeller jloodyy It and the shaft I1, a number ofY theilexible vanes 25 and the cam element 26. The flexible Vane 25 is ofdecreasing crossseotion'ifrom-fthe base where it joins the impeller bodyI6 .toward the tip. The tip 28 of the vane 25 is, however, considerablyenlarged over the shaft portion, being enlarged into a round'or 4ovalshapedknob the end of which is adapted .to engage the inside 'of the'pumpv casing 'during rotation. As the vane 25 passesoverthejarcuate'surfaceQ-S, it is flexedto such 7a degree that 4thejtip 28`lsurbstantially Ffills the opening between the A'cam rsurface andimpellerV body. Hen-ce amore co`mplete 4vacuum vis Aproduced faheadofthe lflexed vane and a higher pressure "is createdinwthe areaimmediately following the flexed vanerecessedarea 2 9 is providedoneither -side of ofthe wvane '2 l'rwhere itujoins thempeller v*body IB:By lthis arrangement the vane-mary be more easilyY and -completelyflexed with less 'possibility of failure 'at-*the juncture.Thefvvanealso can more easily 'assume extreme position shown Lin FigureS'wherein the tipfZ-substantially fills` Athe space-between the-fcam1and the impellerbody His Y Y l The -arcuate-element 264s reverselycurvedfin a special Wayinethegpreferred embodimentaof the "invention.With respectA to tflrecenter of the rotating shaft the camsurface-iscurved in a concave- =direction-eitlfeither Aend land "is-curved in a -vconvex- -'direction at'v xthe center-.-A Cu-reingthe surfaceinthis-cfas`hion-aids-in the graduali application off iitl-1e vilex'ingjforcel ltothewvan'es.

The Acurr,ed-element "-2E'iis adapted toib'e =slideibly inserted finto jfthe wedges-shapedrecessfln the casing 2 anditolbeiheldin-'fplacef-bythelshoulf ders-Bland 31| '(Figurel).'-IYhe--curvedfelement 26 may ibe readily -fvreplacedbyremoving V-thecoverplate '124 fdiligure 2).; sliding V the element-.lV 26A outffoffitsretaining recess,` and inserting a1 new felementfintol recess.Thef-impeller -|fis `similarly :removable #by removing cover-plate 254.and-.sliding thefimprellenFB axially on shaft L1. v

vIn `Figure Ltithe grid `construction 'in the iinle't Theigrid.32*:correspondsitofthe inlet'f'opening 4 plurality. of. :diagonally`positioned bars-3ft serve'f the suction l YmaIx`fltiwhich'-disti'libutes fthe l fluid Bthrough a plurality :of .conduits -B'Bliand 1+i-l f to the proper inlet openings in the pump case ing. Thelconduits 36 and 31 are flanged for connection to the inlet conduits 8and 9 which communicate With the interior of the Dump. In like mannerfluid being discharged from the ,pump enters 'thefconduits l' 'and |.land is passed through flanged connections "to the discharge `conduits 38`and 39 respectively. The discharged viluid is collected from theconduits 38 and B 1 0' in the; discharge manifold 4i), and is thereafterpassed through the flanged opening into the discharge; lineo'f thesystem.

IrLFigures 9' and 110 the suction and discharge manifold assemblies areillustrated in perspective. The flanges .M and 42 of Figure 9 and theflanges 43 and 44 of Figure 10 are adapted for .connecting'to the.corresponding flanges on the pumpcasing. The larger flanges 45 onFigure 9 and 46 on Figure l0, `are adapted for connecting,V to thesuction andv discharge lines of .the fluid system.

A'It 'is contemplated 'that lpumps 'made according to the presentinvention may have any desired number ofl pumping units Within asinglecasing. For example; two 'units are illustrated and"desrbdherein-jas aprepared embodiment o'f the invention: But any-number-ofunits such yas 3or 6 may be used merely Iby makingcertain changesinf-the arrangementand'number 'of parts. 'By la `Vunit"is meant `the :combination ofadjacent :inlet land outletv openings in :a` l'plump casing 4anda-squeezing surface intermediate 'said pair of openings;rltWillibe-desirable, or" "course, toincrease they number Yof -vanes Von4the vjimpeller-as the'nuin-ber 'of nuits Ais increased. kltwillalsof-be evidentft-hat--a more elaborate manifold assembly Will berequired-itc raccommodate more `than 'two units.

'The-pump described lherein "may be used; to

convey liquids --of various viscosities, gasesY and slurries of solidsin liquids upto-cons'id'eraflolecon-V centrations `llt-rnay--`\be--operated `over a vWide range of speeds depending upontheiindivi'dua-l situation. The Apump iis particularly adaptable U forusefas afproporticning pump when driwenby a -directflcurrent 4electricVfrnotor; or 'other 'easily adjustable-power `unit `With-'a4 rheostat'tochange the -driving speed: Maintenance and cleaning 4of the internalpartss greatly (simplified because dt" the easey'of access A:to `theinterior through `the removable --coverplate v r-lfhe jpresent--pump'isespecially useful *in handlingfcorrosive Jiluidzssuclr'as -`chemical"solutions,

slurries and fth'eflilre. The linterior 'of the pump has nofbearingswand ihencefthere' `is no Vdanger of bearing corrosion. Thematerialsusedin-making the pump may v'be -varied 'Widely Ain order toaccommodate any ftype'of corrosive or non-oorros'ive fluid. 'Forexample, fin 'the handling yof certain especially corrosive "uids,rit-Would `he desirablefrto 'use `lead, `stainless steel,A or .monelmetal for the metallicY parts ofV the pjcimprandfa neoprene :impeller,and vane assembly. 'IfY the fluidg'is Aessentially.nonfcorrosive it[may be-def sirable to use cast iron fouine-.pumpcasing and naturalrubber. for `theiinpeller 1.assen/ibly.

VThe invention is hereby .claimed .as :follows:

l., A, rotary pump comprising acasinghauins a plurality of inlet and outletnpenings disposed vtherein," a shaftY mounted4 concentricA to ysaidcasing, an impellerinountedonsaitl.shaft and having apluralityofilexiblevanes extending radially from said shaft, andconveXly-curved'arcuate cam elements ori-theinner circumference or"sa'id casfing and adapted to fleinsta-itlivafnesandfforcessafid vanesinwardly toward said impeller shaft intermediate an outlet and thesucceeding inlet.

2. A rotary pump comprising a casing having a plurality of inlet andoutlet openings disposed therein, a shaft mounted concentric to saidcasing, an impeller mounted on said shaft and having a plurality offlexible vanes extended radially from said shaft, a pair of convexlycurved arcuate cam elements on the inner circumference of said casingand adapted for flexing and forcing said vanes inwardly toward saidimpeller shaft intermediate an outlet and the succeeding inlet, andinlet and outlet manifolds connected respectively to said inlets andsaid outlets.

3. A rotary pump comprising a casing having a plurality of inlet andoutlet openings disposed therein, a shaftY mounted concentric to saidcasing, an impeller mounted on said shaft and having a plurality ofiiexible vanes extending radially from said shaft, and convexly curvedarcuate cam elements, forming part of the inner circumference of saidcasing and adapted for flexing and forcing said vanes inwardly towardsaid impeller shaft intermediate an outlet and the succeeding inlet,said flexible vanes being integrally molded with the body of saidimpeller and having a recessed area transverse to the axis of rotationof the body at the juncture of the vane with said body.

4. A rotary pump comprising a casing having a plurality of inlet andoutlet openings disposed therein, a shaft mounted concentric to saidcasing, an impeller mounted on said shaft and having a plurality offlexible vanes extending radially from said shaft, and a pair ofconvexly curved arcuate cam elements forming part of the innercircumference of said casing and adapted for flexing and forcingsaidvanes inwardly toward said impeller shaft intermediate an outlet and thesucceeding inlet, said vanes decreasing in cross-section from the basetoward the tip but increasing in cross-section at the tip to form a beadthereon.

5. A rotary pump comprising a casing having a plurality of inlet andoutlet openings disposed therein, a shaft mounted concentric to saidcasing, an impeller mounted on said shaft and having a plurality offlexible vanes extended radially from said shaft, and convexly curvedarcuate cam elements forming part of the inner circumference of saidcasing and adapted for flexing and forcing said vanes inwardly towardsaid impeller shaft intermediate an outlet and the succeeding inlet,said arcuate cam elements being slidably replaceable Within said casing.

6. A rotary pump comprising a casing having a plurality of inlet andoutlet openings disposed therein, a shaft mounted concentric to saidcasing, an impeller mounted on said shaft and having a plurality ofexible vanes extended radially from said shaft, and a plurality ofarcuate cam elements, forming part of theinner circumference of saidcasing and adapted for flexing and forcing said vanes inwardly towardsaid impeller shaft intermediate an outlet and the succeeding inlet,said arcuate cam elements being 6 concavely curved at either end withrespect to said shaft and convexly curved at the center.

7. A rotary pump comprising a casing having a plurality of inlet andoutlet openings disposed therein, a shaft mounted concentric to saidcasing, an impeller mounted on said shaft and having a plurality offlexible vanes extended radially from said shaft, and a plurality ofconvexly curved arcuate cam elements forming part of the innercircumference of said casing and adapted for exing and forcing saidvanes inwardly toward said impeller shaft intermediate an outlet and thesucceeding inlet, said inlet and outlet openings being covered by gridscomprising a plurality of diagonally positioned bars adapted to form aportion of the circumferential inner Wall of said casing.

8. A rotary concentric vane-type, self priming, positive displacementpump for handling corrosive fluids Which comprises a casing made ofcorrosion resisting metal a plurality of openings in said casingarranged in sets consisting of an adjacent inlet and outlet opening, aplurality of replaceable convexly curved arcuate cam elements forming aportion of the inner circumferential surface of said casing, said camsbeing positioned intermediate tWo sets of openings and spaced therefrom,a pair of end plates adapted to close said casing, a shaft extendingthrough at least one of said plates and having a corrosive resistantmolded resilient impeller interlocked thereto concentric With saidcasing, said impeller having a plurality of exible vanes extendingradially from said shaft, said vanes being adapted to be exed by saidcam elements inwardly toward said shaft during rotation of saidimpeller, drive means for rotating said shaft and suction and dischargemanifolds connected respectively to said inlets and outlets.

EUGENE MAYUS. WALTER GEORGE SEE.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 945,953 Hughes Jan. 11, 1910 1,043,936 Hope Nov. 12, 19121,445,721 Schleppy Feb. 20, 1923 2,007,954 Carlson July 16, 19352,052,474 Johnson Aug. 25, 1936 2,117,011 Pratt May 10, 1938 2,189,356Briggs Feb. 6, 1940 2,203,974 Weinhardt June 11, 1940 2,455,194 RumseyNov. 30, 1948 2,460,952 Simer et al. Feb. 8, 1949 2,466,440 KiekhaeferApr. 5, 1949 2,499,163 Rand Feb. 28, 1950 2,542,240 Fernstrum Feb. 20,1951 2,542,268 Weyer Feb. 20, 1951 FOREIGN PATENTS Number Country Date16,643 Great Britain of 1891 243,352 Italy Feb. 27, 1926

